input[type='radio'] {
  width: 100%;
  height: 100%;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border: 1px solid #ccc;
  position: absolute;
  vertical-align: middle;
  border-radius: 50%;
  margin: 0;
}

.current-row input[type='radio'] {
  background: #20a0ff;
  border-radius: 50%;
  border: none;
}

input[type='radio']:focus {
  outline: 0;
}

input[type='radio'] ~ .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #fff;
  content: '';
  position: absolute;
  left: 6px;
  top: 6px;
  transform: scale(0, 0);
  transition: all 0.2s ease;
}

.current-row input[type='radio'] ~ .dot {
  transform: scale(1, 1);
  z-index: 5;
}
.radio {
  width: 18px;
  height: 18px;
  position: relative;
  display: inline-block;
  vertical-align: middle;
}